Using AudioOption to enable audio network adaptor.

BUG=webrtc:6303

Review-Url: https://codereview.webrtc.org/2397573006
Cr-Original-Commit-Position: refs/heads/master@{#14845}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 6b825df37e49398bac89abedc6a45048b87d54ed
11 files changed